Title: Firefox/IE
Last modified: August 18, 2016

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# Firefox/IE

 *  [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * (@victoriasarah)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/)
 * Question: why does my blog is fine in: IE but in Firefox this occurs:
    Warning:
   Cannot modify header information – headers already sent by (output started at/
   home/heyloser/public_html/wp-content/plugins/theme-switcher.php:164) in /home/
   heyloser/public_html/wp-admin/admin.php on line 9
 * ??

Viewing 8 replies - 1 through 8 (of 8 total)

 *  [moshu](https://wordpress.org/support/users/moshu/)
 * (@moshu)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225539)
 * [http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
 *  Thread Starter [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * (@victoriasarah)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225629)
 * I read, still i dont understan, I mean, do i have to check is there arent spaces
   left on the theme-switcher.php ?
 *  [Mark (podz)](https://wordpress.org/support/users/podz/)
 * (@podz)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225630)
 * Yea – it’ll be on the last line. Nothing at all, not even a space, after
 * ?>
 *  [moshu](https://wordpress.org/support/users/moshu/)
 * (@moshu)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225631)
 * Yes. That’s exactly what the site I linked above says. Just read it and apply
   it.
 *  Thread Starter [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * (@victoriasarah)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225633)
 * I did that and there’s still the same error on firefox =/
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/heyloser/public_html/wp-content/plugins/theme-switcher.php:164) in /
   home/heyloser/public_html/wp-admin/admin.php on line 9
 *  Thread Starter [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * (@victoriasarah)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225673)
 * I really need help in this -=/, by the way my css is validated
 *  [moshu](https://wordpress.org/support/users/moshu/)
 * (@moshu)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225674)
 * 1. I don’t see any error message on your site. Try cleaning your cache (Ctrl+
   F5) and see it after that.
    2. CSS might be valid but your html code has 154 
   errors.
 *  Thread Starter [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * (@victoriasarah)
 * [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225691)
 * my html has 7 errors. and.. i think its solved. i havent received any complaints.
   thank you !

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘Firefox/IE’ is closed to new replies.

 * In: [Installing WordPress](https://wordpress.org/support/forum/installation/)
 * 8 replies
 * 3 participants
 * Last reply from: [victoriasarah](https://wordpress.org/support/users/victoriasarah/)
 * Last activity: [20 years, 10 months ago](https://wordpress.org/support/topic/firefoxie/#post-225691)
 * Status: not resolved

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